Dinitrogen oxide detection for process failure early warning systems

A number of experiments were conducted in order to establish whether the concentration of N2O in the off-gas from an activated sludge pilot plant could be used as a indicator for monitoring the nitrification process and as an early indication of ammonia appearing in the plant effluent. A strong corr...

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Bibliographic Details
Published in:Water science and technology 2002-01, Vol.45 (4-5), p.247-254
Main Authors: BURGESS, J. E, STUETZ, R. M, MORTON, S, STEPHENSON, T
Format: Article
Language:English
Subjects:
Activated sludge
Activated Sludge Process
Aeration
Aeration tanks
Allylthiourea
Ammonia
Ammonia - analysis
Applied sciences
Biological and medical sciences
Biological treatment of waters
Bioreactors
Biotechnology
Correlation
Detection
Dissolved oxygen
Early warning systems
Environment and pollution
Exact sciences and technology
Exhaust gases
Fundamental and applied biological sciences. Psychology
General purification processes
Industrial applications and implications. Economical aspects
Loads (forces)
Monitoring
Nitrification
Nitrogen Compounds - analysis
Nitrous oxide
Oxygen - analysis
Oxygen depletion
Pollution
Sewage - chemistry
Shock loads
Sludge
Time Factors
Warning systems
Wastewaters
Water Purification - methods
Water treatment and pollution
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Summary:A number of experiments were conducted in order to establish whether the concentration of N2O in the off-gas from an activated sludge pilot plant could be used as a indicator for monitoring the nitrification process and as an early indication of ammonia appearing in the plant effluent. A strong correlation was found between ammonia shock loads and the concentration of N20 in the off-gas from the aeration tank for ammonia shock loads and dissolved oxygen depletion. When subjecting the experimental setup to doses of a nitrification inhibitor (allylthiourea) a similar pattern was seen with a correlation between nitrite build up in the aeration tank and concentration increase of N2O in the off-gas from the aeration tank. The results from this work suggest the concentration and the changes in the concentration of N2O in the exhaust gas from a nitrifying process may be a useful parameter for monitoring nitrifying activated sludge processes.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2002.0597